From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Bow spring design options for a pump casing and the accessibility of a valve.
Identifier | ExFiles\Box 66a\4\ scan0008 | |
Date | 13th March 1926 guessed | |
-2- pieces rivetted together as per your suggestion - LeC.2207 and another made out of one piece of material bent to shape. The latter does not require so much space for the same degree of flexibility. The one piece spring could be made out of thin bronze or from steel and tempered to the proper shape on the former. Bronze would have the advantage of giving less bow spring load for the same deflextion, and hence more constant oil pressure. ACCESSIBILITY OF VALVE. As we have not received any particular complaint of accessibility of the 20 HP. valve we have mounted the new valve as before on the bottom of the pump. Taking into account the increased reliability we hope to get with this valve we think this should be satisfactory. It would add complication with very little increase of accessibility to transfer the valve to the wheelcase where the relief oil is sprayed on the gears, and there would be more pipe line under high pressure. INSTRUCTIONS TO WORKS. Unless we hear from you to the contrary we propose to instruct LeC.2207 pump casing with both types of bow springs. E.{Mr Elliott - Chief Engineer} | ||